As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLIMBING THROUGH 26,000 FEET WITH 3 TURBO COMPRESSORS OPERATING, LOST CABIN PRESSURIZATION WITH ASSOCIATED LOUD NOISE. DESCENDED TO 10,000 FEET AND RETURNED TO MIAMI WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND LEFT AND RIGHT T/C HEAT EXCHANGER DUCT COUPLINGS DISCONNECTED. RECONNECTED DUCTS AND SYSTEM OPERATIONAL CHECKED NORMAL. PRESSURIZATION OK ON THE GROUND.